Yesterday i flew my P4P on a hot and humid day, i tap the batt icon to check the cells levels but also noticed that the batt temp reached 58 degrees Celcius (136 farenheit ) !!! was that almost the limit or could it go higher ?
It can go higher.
For such hot and humid conditions it's not unusual. But I would fly less aggressively and not hoover more than necessary at that batt temp.